{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1999:2WBDOAZRY474ATP7XBP26RMGNR","short_pith_number":"pith:2WBDOAZR","canonical_record":{"source":{"id":"quant-ph/9911069","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1999-11-15T14:13:29Z","cross_cats_sorted":[],"title_canon_sha256":"7660cd7c70e198fa9b005a67a7ac5b8d785fc13f1cf3562366cdd6daf459197d","abstract_canon_sha256":"4b1e8835cf0cd5ea451fc51892a24dad6451d583a8e5016497c8f9759b9e6b63"},"schema_version":"1.0"},"canonical_sha256":"d582370331c73fc04dffb85faf45866c6d51130a6d11393e44a4cbf5fa6d9568","source":{"kind":"arxiv","id":"quant-ph/9911069","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9911069","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9911069v1","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9911069","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"pith_short_12","alias_value":"2WBDOAZRY474","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"pith_short_16","alias_value":"2WBDOAZRY474ATP7","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"pith_short_8","alias_value":"2WBDOAZR","created_at":"2026-07-04T16:16:27Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1999:2WBDOAZRY474ATP7XBP26RMGNR","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/9911069","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"1999-11-15T14:13:29Z","cross_cats_sorted":[],"title_canon_sha256":"7660cd7c70e198fa9b005a67a7ac5b8d785fc13f1cf3562366cdd6daf459197d","abstract_canon_sha256":"4b1e8835cf0cd5ea451fc51892a24dad6451d583a8e5016497c8f9759b9e6b63"},"schema_version":"1.0"},"canonical_sha256":"d582370331c73fc04dffb85faf45866c6d51130a6d11393e44a4cbf5fa6d9568","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T16:16:27.192956Z","signature_b64":"L2luvjF8GuPRKPQPCKgE3EwXqD2Y7nynERYAvRTKBzZzECYhZmNf8ykYHCaDk4WIr6QdWDjX6GiWIh0ZkW9+AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d582370331c73fc04dffb85faf45866c6d51130a6d11393e44a4cbf5fa6d9568","last_reissued_at":"2026-07-04T16:16:27.192543Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T16:16:27.192543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/9911069","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:16:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LzNBDcCSdZViHJsaODnCpUS+5ofI89dQ1fzY4PYIYPokKcDhnty3voYiUm+uuauzzahQbvsMbCirnCS61L22Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T13:40:45.974140Z"},"content_sha256":"9e46efeea17d815985283fae6a59ceed10f3723e7074bff95be40b7de316a8ee","schema_version":"1.0","event_id":"sha256:9e46efeea17d815985283fae6a59ceed10f3723e7074bff95be40b7de316a8ee"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1999:2WBDOAZRY474ATP7XBP26RMGNR","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Motional Squashed States","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"David Vitali, Paolo Tombesi, Stefano Mancini","submitted_at":"1999-11-15T14:13:29Z","abstract_excerpt":"We show that by using a feedback loop it is possible to reduce the fluctuations in one quadrature of the vibrational degree of freedom of a trapped ion below the quantum limit. The stationary state is not a proper squeezed state, but rather a ``squashed'' state, since the uncertainty in the orthogonal quadrature, which is larger than the standard quantum limit, is unaffected by the feedback action."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9911069","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/quant-ph/9911069/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-04T16:16:27Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K3N2uuL6UeFBaON6tkJrfHRzZtZp/wDHbjguvtxb9N1mEL3w908oATlkqbU01qUx4hdKGYJ/oTym/GBQW1I8AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T13:40:45.975035Z"},"content_sha256":"e9ad33774431bbc24245487202603f93bcfbcac3b4443e208ef97b1dfc0a9fae","schema_version":"1.0","event_id":"sha256:e9ad33774431bbc24245487202603f93bcfbcac3b4443e208ef97b1dfc0a9fae"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2WBDOAZRY474ATP7XBP26RMGNR/bundle.json","state_url":"https://pith.science/pith/2WBDOAZRY474ATP7XBP26RMGNR/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2WBDOAZRY474ATP7XBP26RMGNR/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-04T13:40:45Z","links":{"resolver":"https://pith.science/pith/2WBDOAZRY474ATP7XBP26RMGNR","bundle":"https://pith.science/pith/2WBDOAZRY474ATP7XBP26RMGNR/bundle.json","state":"https://pith.science/pith/2WBDOAZRY474ATP7XBP26RMGNR/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2WBDOAZRY474ATP7XBP26RMGNR/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1999:2WBDOAZRY474ATP7XBP26RMGNR","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4b1e8835cf0cd5ea451fc51892a24dad6451d583a8e5016497c8f9759b9e6b63","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1999-11-15T14:13:29Z","title_canon_sha256":"7660cd7c70e198fa9b005a67a7ac5b8d785fc13f1cf3562366cdd6daf459197d"},"schema_version":"1.0","source":{"id":"quant-ph/9911069","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/9911069","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/9911069v1","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/9911069","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"pith_short_12","alias_value":"2WBDOAZRY474","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"pith_short_16","alias_value":"2WBDOAZRY474ATP7","created_at":"2026-07-04T16:16:27Z"},{"alias_kind":"pith_short_8","alias_value":"2WBDOAZR","created_at":"2026-07-04T16:16:27Z"}],"graph_snapshots":[{"event_id":"sha256:e9ad33774431bbc24245487202603f93bcfbcac3b4443e208ef97b1dfc0a9fae","target":"graph","created_at":"2026-07-04T16:16:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/quant-ph/9911069/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We show that by using a feedback loop it is possible to reduce the fluctuations in one quadrature of the vibrational degree of freedom of a trapped ion below the quantum limit. The stationary state is not a proper squeezed state, but rather a ``squashed'' state, since the uncertainty in the orthogonal quadrature, which is larger than the standard quantum limit, is unaffected by the feedback action.","authors_text":"David Vitali, Paolo Tombesi, Stefano Mancini","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"1999-11-15T14:13:29Z","title":"Motional Squashed States"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/9911069","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:9e46efeea17d815985283fae6a59ceed10f3723e7074bff95be40b7de316a8ee","target":"record","created_at":"2026-07-04T16:16:27Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4b1e8835cf0cd5ea451fc51892a24dad6451d583a8e5016497c8f9759b9e6b63","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"1999-11-15T14:13:29Z","title_canon_sha256":"7660cd7c70e198fa9b005a67a7ac5b8d785fc13f1cf3562366cdd6daf459197d"},"schema_version":"1.0","source":{"id":"quant-ph/9911069","kind":"arxiv","version":1}},"canonical_sha256":"d582370331c73fc04dffb85faf45866c6d51130a6d11393e44a4cbf5fa6d9568","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d582370331c73fc04dffb85faf45866c6d51130a6d11393e44a4cbf5fa6d9568","first_computed_at":"2026-07-04T16:16:27.192543Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T16:16:27.192543Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"L2luvjF8GuPRKPQPCKgE3EwXqD2Y7nynERYAvRTKBzZzECYhZmNf8ykYHCaDk4WIr6QdWDjX6GiWIh0ZkW9+AA==","signature_status":"signed_v1","signed_at":"2026-07-04T16:16:27.192956Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/9911069","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9e46efeea17d815985283fae6a59ceed10f3723e7074bff95be40b7de316a8ee","sha256:e9ad33774431bbc24245487202603f93bcfbcac3b4443e208ef97b1dfc0a9fae"],"state_sha256":"d4b0bf22628564f7f92f6b33f8919b42a9e803b740a15489b20e7c540c34ba1d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3hB0h6uKq1Q7wxuP0zxit/urZDJV6itz8hNfMYErOAlFzfiBt20h/+H6b+bkqTWJ64kwHixumlymQv5NPqL/CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T13:40:45.979618Z","bundle_sha256":"213b94d754062eee27b137679980de58617ad1ee12c4dd2de2611898cf592962"}}